Rainbow-electronics ATF16V8CZ Manual de usuario descargar pdf (Pagina 5)

ATF16V8CZ

Input Test Waveforms and

Measurement Levels

, t

< 1.5 ns (10% to 90%)

Output Test Loads

Note: Similar devices are tested with slightly different loads.

These load differences may affect output signals’ delay

and slew rate. Atmel devices are tested with sufficient

margins to meet compatible devices.

Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.

Power-up Reset

The ATF16V8CZ’s registers are designed to reset during

power-up. At a point delayed slightly from V

crossing

RST

, all registers will be reset to the low state. As a result,

the registered output state will always be high on power-up.

This feature is critical for state machine initialization.

However, due to the asynchronous nature of reset and the

uncertainty of how V

actually rises in the system, the

following conditions are required:

1. The V

rise must be monotonic, from below 0.7V,

2. After reset occurs, all input and feedback setup

times must be met before driving the clock term

high, and

3. The signals from which the clock is derived must

remain stable during t

Pin Capacitance

f = 1 MHz, T = 25°C

(1)

Typ Max Units Conditions

58 pFV

= 0V

OUT

68 pFV

OUT

= 0V

Parameter Description Typ Max Units

Power-up Reset Time 600 1,000 ns

RST

Power-up Reset Voltage 3.8 4.5 V

1 2 3 4 5 6 7 8 9 10 11 12

ATF16V8CZ 1
0453F–08/99/xM 12

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Rainbow-electronics ATF16V8CZ Manual de usuario Pagina 5

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